Well, I am going to make the circuit, and have already purchased the parts, but I "amped it up" I bought higher power transistors, and have only spent about $5, so I think your $25 is a bit of an over estimation....

Originally posted by THE_SKINNY_MP3_KID:
<STRONG>Well, I am going to make the circuit, and have already purchased the parts, but I "amped it up" I bought higher power transistors, and have only spent about $5, so I think your $25 is a bit of an over estimation....</STRONG>

nice way to waste $5 I say!! could have bought a large big Mac meal at McDonalds for that....

Originally posted by THE_SKINNY_MP3_KID:
<STRONG>Do you really think that buying parts for your MP3 player is a waste of money????
if you do, then why have you made a player????</STRONG>

no, but what I did do is studied the theory and discoveries of others and thus avoided some of the mistakes of others before me.... thus not making a waste of my own money!

from my point of view, you have started a thread, asked a question.... got an answer from people like Aaron, Charles and Technics who like myself have had a bit more experence in this area. you didnt get the answer you wanted, but are still going ahead.

thats great you want to experiment with this, thats all part of the learning I guess.... but I was just voicing my opinion on reviewing this thread that you have wasted your money....

Originally posted by THE_SKINNY_MP3_KID:
<STRONG>Well, is I use the 6volt-12volt voltage doubler thing on Aarons website, and change the zener diode to a 15volt or so, could I use this for the 12volt rail for my player, using a 7812 regulatoer as well?? And then use a 7805 and a transistor for the 5volt rail?
The power supply would run on between about 7 and 16 volts...
would this work???</STRONG>

a 7805 is one of the most inefficent regulators out there. they will run a 650 amp hour battery down in a weekend

well, It will work, it should be able to deliver 1.5amps at least and it will work...
and it won't get hot, and everything will be fine...
Why wouldn't it work??
I have atlest doubled the power handling of the transistors, and have used a higher power zener diode, and larger diodes...